java PreparedStatement操作oracle数据库

import java.sql.Connection;

import java.sql.ResultSet;

import java.sql.SQLException;

//import java.sql.Statement;

import java.sql.PreparedStatement;

public class lx02{

public static void main(String[] args) throws SQLException, ClassNotFoundException{

// 加载驱动

Class.forName("oracle.jdbc.driver.OracleDriver");

java.sql.DriverManager.registerDriver(new oracle.jdbc.driver.OracleDriver());

//建立连接

String url = "jdbc:oracle:thin:@100.100.100.20:1521:dbsid2";

String user="scott";

String password="tiger";

Connection con=java.sql.DriverManager.getConnection(url, user, password);

//执行语句

/*  String sql1="select * from user_tables";

Statement smt=con.createStatement();

ResultSet rs1=smt.executeQuery(sql1);

*/

//preparestatemetn语句: 输入

/*    String sql2="insert into a(deptno,dname,loc) values(?,?,?)";

PreparedStatement ps=con.prepareStatement(sql2);

ps.setString(1,"50");

ps.setString(2, "pmo");

ps.setString(3,"beijing");

int rs2=ps.executeUpdate();

*/

//查询

String sql="select dname from a where dname like ?";

PreparedStatement ps=con.prepareStatement(sql);

ps.setString(1, "pmo");

ResultSet rs=ps.executeQuery();

//删除字节

/*  String sql="delete from a where deptno=50";

PreparedStatement ps=con.prepareStatement(sql);

ps.executeUpdate();

*/

//显示结果

while(rs.next()){

System.out.println(rs.getString(1));

//      System.out.println(rs.getString(1) + "  " + rs.getString(2)+"   "+ rs.getString(3));

}

//释放

rs.close();

ps.close();

con.close();

}

}

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